QPrintDialog在Windows中显示两次

Question

I've written this piece of code which takes the contents of a QPlainTextEditor and then sends that to a QPrint object it the the user accepts QPrintDialog

void MainWindow::on_actionPrint_triggered()
{
    printPage = new QPrinter(QPrinter::HighResolution);
    QPrintDialog *printDialog = new QPrintDialog(printPage,this);
    printDialog->show();
    if(printDialog->exec() == QPrintDialog::Accepted){
        QPainter *painterToPrnt = new QPainter;
        painterToPrnt->begin(printPage);
        painterToPrnt->drawText(printPage->pageRect(),ui->plainTextEdit->toPlainText());
        painterToPrnt->end();
    }
}

it works OK under KDE (didn't try that under Gnome), but in Windows, whenever I accepts the printDialog, the dialog will be shown again and if I accept that again, it will send the text to the printer.

how can I fix that?

Answer 1

I think it's enough to call only exec() . You can remove the call of show() .